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Date: Tue, 11 Aug 2020 05:53:50 +0530 From: Sumera Priyadarsini <sylphrenadin@...il.com> To: Julia.Lawall@...6.fr Cc: gregkh@...uxfoundation.org, Gilles.Muller@...6.fr, nicolas.palix@...g.fr, michal.lkml@...kovi.net, corbet@....net, cocci@...teme.lip6.fr, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, Sumera Priyadarsini <sylphrenadin@...il.com> Subject: [PATCH v4] documentation: coccinelle: Improve command example for make C={1,2} Modify coccinelle documentation to further clarify the usage of the makefile C variable by coccicheck. Signed-off-by: Sumera Priyadarsini <sylphrenadin@...il.com> --- Changes in v4: - Modify commit message to clarify C is a variable --- Documentation/dev-tools/coccinelle.rst | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/Documentation/dev-tools/coccinelle.rst b/Documentation/dev-tools/coccinelle.rst index 6c791af1c859..74c5e6aeeff5 100644 --- a/Documentation/dev-tools/coccinelle.rst +++ b/Documentation/dev-tools/coccinelle.rst @@ -175,13 +175,20 @@ For example, to check drivers/net/wireless/ one may write:: make coccicheck M=drivers/net/wireless/ To apply Coccinelle on a file basis, instead of a directory basis, the -following command may be used:: +C variable is used by the makefile to select which files to work with. +This variable can be used to run scripts for the entire kernel, a +specific directory, or for a single file. - make C=1 CHECK="scripts/coccicheck" +For example, to check drivers/bluetooth/bfusb.c, the value 1 is +passed to the C variable to check files that make considers +need to be compiled.:: -To check only newly edited code, use the value 2 for the C flag, i.e.:: + make C=1 CHECK=scripts/coccicheck drivers/bluetooth/bfusb.o - make C=2 CHECK="scripts/coccicheck" +The value 2 is passed to the C variable to check files regardless of +whether they need to be compiled or not.:: + + make C=2 CHECK=scripts/coccicheck drivers/bluetooth/bfusb.o In these modes, which work on a file basis, there is no information about semantic patches displayed, and no commit message proposed. -- 2.17.1
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